The micro-tube heat transfer and fluid flow of water based A1_2O_3 nanofluid with viscous dissipation

摘要

The numerical modeling of the conjugate heat transfer and fluid flow of AI_2O_3/water nanofluid through the micro-tube was presented in the paper. The laminar flow regime was considered along with viscous dissipation effect. The diameter ratio of the micro-tube was D_i/D_o = 0.1/0.3 mm with a tube length L= 100 mm. The heat transfer rate was fixed to Q=0.5 W with three different Br = 0.1,0.5 and 1. The water based A1_2O_3 nanofluid was considered with various volume concentrations of A1_2O_3 particles φ = 1, 4, 6, 9% and two diameters of the particles D_p = 10 nm and 47 nm. The analysis was performed on the results for local heat transfer coefficient.